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High-Temperature Transformer Epoxy Resin with V1 Flammability H-Class Thermal Endurance and Pre-Mixed Fillers for APG Casting

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Shanghai Wenyou Industry Co., Ltd.

City: shanghai

Province/State:shanghai

Country/Region:china

Tel:86-21-57500369-841

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High-Temperature Transformer Epoxy Resin with V1 Flammability H-Class Thermal Endurance and Pre-Mixed Fillers for APG Casting

Brand Name	WENYOU
Model Number	LW-8229A/LW-8229B
Certification	ISO/REACH/RoHS/SGS/UL
Place of Origin	CHINA
Minimum Order Quantity	20kg/pail as sample
Price	Negotiable
Payment Terms	L/C,T/T,Western Union,MoneyGram
Supply Ability	Plenty of raw material in stock
Delivery Time	7 -10 work days
Packaging Details	20kg/pail, 220kg/barrel, 1200kg/tank
Breakdown Strength	≥25 kV/mm
Tracking Resistance	≥600 V
Dielectric Constant	3.0-4.0 (50Hz)
Flammability	V1 (UL94)

Detailed Product Description

Pre-Filled Epoxy System | V1 Flammability | HV Insulation (10-35kV) | APG/Vacuum Casting

Product Attributes

Attribute	Value
Breakdown Strength	≥25 kV/mm
Tracking Resistance	≥600 V
Dielectric Constant	3.0-4.0 (50Hz)
Flammability	V1 (UL94)

Product Description

The LW-8229A/LW-8229B is a pre-mixed, filler-loaded epoxy system designed for medium/high-voltage insulation (10-35kV). Combining modified BPA epoxy (LW-8229A) and anhydride hardener (LW-8229B) with integrated fillers, it delivers superior crack resistance, V1 flammability rating (UL94), and H-class thermal endurance (180°C). Optimized for vacuum casting and APG processes in transformers, CTs, and terminal posts.

Key Features & Advantages

Feature	Advantage
Pre-Mixed Fillers	Simplified processing, consistent dispersion
V1 Flammability Rating	Enhanced fire safety for critical electrical components
Thermal Class H (IEC 60085)	Stable performance up to 180°C
APG & Vacuum Casting Ready	Flexible production integration
High Arc Resistance	181-198 sec (IEC 61621)
Low Water Absorption	0.10-0.20% (23°C/10d)
Dual-Process Compatibility	Adapts to APG or vacuum workflows

Applications

Ideal for sealed electrical insulation:

10-35kV terminal posts & bushings
Dry-type transformers & current transformers
Switchgear insulation components
HV sensor encapsulation
Grid protection devices

Key Performance Data

Cured system: LW-8229A/LW-8229B = 100:100 | Cure: 140°C*4h + 150°C*12h

Mechanical & Thermal Properties

Property	Value	Standard
Flexural Strength	90-130 MPa	ISO 178
Tensile Strength	55-85 MPa	ISO 527
Impact Strength	8-15 kJ/m²	ISO 179
Glass Transition (Tg)	105-120°C	ISO 11357-2
Thermal Conductivity	0.8-0.9 W/m*K	ISO 8894-1
Decomposition Temp	>320°C	ASTM E2402

Electrical & Safety Properties

Property	Value	Standard
Breakdown Strength	≥25 kV/mm	IEC 60243-1
Volume Resistivity	10¹⁵ Ω*cm	IEC 62631-3-1
Tracking Resistance	≥600 V	IEC 60112
Dielectric Constant	3.0-4.0 (50Hz)	IEC 60250
Flammability	V1 (UL94)	UL94/GB/T2408
Hydrophobicity	HC1 Class	IEC 62073

Frequently Asked Questions (FAQ)

Q1: Are fillers pre-mixed in this system?

A: Yes! Both LW-8229A (resin) and LW-8229B (hardener) contain pre-dispersed fillers, ensuring uniform properties and reduced mixing complexity.

Q2: What curing cycle is recommended?

A: For vacuum casting:
Cure: 75°C/4-5h → 95°C/2h → 115°C/4-6h → Post-cure 150°C/12h
For APG: Post-cure 130-150°C/10-12h after molding.

Q3: Why choose V1 flammability over HB?

A: V1 rating offers superior fire resistance for high-risk applications like transformers and terminal posts, meeting stricter safety standards.

Q4: Is silica filler adjustable?

A: Fillers are pre-loaded. For custom ratios, contact Shanghai Wenyou for tailored solutions.

Product Tags: high-temperature epoxy resin for electrical insulation epoxy resin system for APG casting transformer epoxy resin with vacuum casting

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